STATUS OF THE DOME-C
ANTARCTIC BSRN STATION
C.LANCONELLI, A. LUPI, M. MAZZOLA, B. PETKOV and V. VITALE
Institute of the Atmospheric Sciences and Climate - CNR ITALY
e-mail: [email protected]
East
SE
SW
S
W
NW
Dome C (75° 06’ S, 123° 24’ E) is
located at 3233 m height on the
polar Plateau at nearly equal
distance from the coastal bases of
Dumont D’Urville (Terre d’Adelie)
and Mario Zucchelli station (Terra
Nova Bay). Concordia is the
French-Italian all-year round station
active since 2005.
• Altitude : 3233 mt. s.l.m. (630 mb)
• Ice thickness: 3213 mt.
• Maximum summer temperature: -20° C
• Minimum summer temperature : -50° C
• Average winter temperature: -60° C
• Wind velocity: 3-10 m/sec
• Snow precipitations: 2-10 cm/year
• Distance by Dumont d’Urville: 1100 Km.
• Distance by Baia Terra Nova: 1200 Km.
(1)
Monthly based statistics 10th, 90th and
average are reported for some quantities
relevant to determine data corrections.
BSRN around Concordia area
(1) Temperature corrections to be performed down
to -70°C require extrapolation of the sensitivity
correction table ST provided by the instrument
constructor. We used a third order polynomial fit
yielding, for some instrument, a -10% variation of
ST down to -70°C.
(2) Offset corrections were considered to be
proportional to absolute value of |NetIR| as
measured by the pyrgeometer (green). It presents
maximum during summer when the surface
temperature inversion is weaker, being a warmer
sky (with respect the surface) seen during
wintertime when a strong and persisting inversion.
(3 and 4) Maximum average offsets do not exceed
-3.0 W/m2 along the .
2014 arrangement
(2)
(3)
LR3030*
NE
Offsets were determined during
the winterover periods and for
SZA>108. Here, the year-round
statisitcs are reported for g2 and
dif components. Offset was then
related to NetIR and extended to
daylight periods using a linear
relationship. Monthly station-toarchive files for bracketed periods
are not yet submitted.
10th percentiles of the offset do
not exceed -2.0 W/m2 for neither
for g2 and dif component diring
the winter period.
Characteristics of the site
LR0100
N
Absolute value of the correction are then reported
for g2 and dif components as averal correction
(ALL), cosine (COS), offset (OFF) and
temperature (TEM).
(4)
Daily evolution of irradiance and albedo
LR0300*
Sky variability
Halo
Albedo and shadow effects
08:00 AM LT
4:00 PM LT
Some speculation wolud be done
using an image set taken over one
whole year from the albedo-rack with
a fish-eye lens every 10 minutes
13th BSRN Scientific Review and Workshop – Bologna, Italy, 9-12 September 2014